I bought this herb to boost my immune system. I took 1500 mg for about two or three weeks when I started to get a really bad headache every day and stomach issues. I also began to wake up in the morning with very swollen eyelids. I've stopped taking it and I am starting to feel myself again. This might not happen to everyone, but I must be allergic or intolerant to it or something...

I hoped this would work as well as the extract so it would be more convenient to take along if we were away from home. I tried this while coming down with a cold and it did not bring the relief the extract does nor did it help me to feel better. We will continue to use the alcohol free extract (same brand) as it does work extremely well and makes you feel better even if you're not sick. It's easier to take than the capsules also.